scholarly journals Effect of Banana Fiber on Flexural Properties of Fiber Reinforced Concrete for Sustainable Construction

2021 ◽  
Vol 12 (1) ◽  
pp. 63
Author(s):  
Ahsan Afraz ◽  
Majid Ali
Keyword(s):  
Reinforced Concrete ◽  
Construction Material ◽  
Vital Role ◽  
Fiber Reinforced Concrete ◽  
Modulus Of Rupture ◽  
Sustainable Construction ◽  
Fiber Reinforced ◽  
Banana Fiber ◽  
Toughness Index ◽  
Efficient Construction

Currently, banana fiber composites have received wide attention because of their ecofriendly properties. The overall aim of this study is to prove banana fiber as an eco-efficient construction material by checking the behavior of banana fiber-reinforced concrete during flexural loading. The length of fiber is kept 50 mm and a fiber content of 5% by the weight of cement was used for preparing banana fiber reinforced concrete. It is shown from the results that the flexural toughness index (FTI) that has a vital role in sustainable concrete increased while the modulus of rupture (MOR) of banana fiber reinforced concrete decreased as compared to ordinary concrete.

Experimental Study of Bending Toughness on Hybrid Fiber Reinforced Concrete

2013 ◽  
Vol 327 ◽  
pp. 201-204
Author(s):  
Jin Song Shi ◽  
Bo Yuan ◽  
Da Zhang Wang ◽  
Zhe An Lu
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Fiber Reinforced Concrete ◽  
Bending Test ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Toughness Index ◽  
The Difference ◽  
Loading Methods ◽  
Index Value

In order to investigate the difference of current toughness index standards for fiber reinforced concrete, two main groups of specimens were made to take bending toughness test with the requirements of corresponded standards, loading methods and loading speeds, which are ASTM C1018 in America, ACI 544 and JSCE G552 in Japan. United with software Origin, the load-deflection curves gathered from bending test was calculated with relative standards. The results show that the calculated toughness index value with ASTM C1018-98 in America is more accurate with three grades but the requested deflection of testing is much longer than others while ACI 544 and JSCE G552 in Japan are quite the contrary.

Flexural Performance Evaluation of Fiber-Reinforced Concrete Incorporating Multiple Macro-Synthetic Fibers

2018 ◽  
Vol 2672 (27) ◽  
pp. 1-12 ◽  
Author(s):  
Michael Dopko ◽  
Meysam Najimi ◽  
Behrouz Shafei ◽  
Xuhao Wang ◽  
Peter Taylor ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Residual Strength ◽  
Performance Enhancement ◽  
Construction Material ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Test Beam ◽  
Synthetic Fibers ◽  
Flexural Performance ◽  
Strength And Toughness

Fiber-reinforced concrete (FRC) is a promising construction material mainly because of the crack-controlling mechanisms that discrete fibers can impart to inherently brittle concrete. Macrofibers, in particular, have been proven effective for providing post-crack ductility and toughness, while synthetic fibers are a promising solution to avoid corrosion-related durability issues. To assess the performance enhancement provided by macro-synthetic concrete fibers, this study performs flexural tests on FRC beams containing three different types of macro-synthetic fibers. The selected fibers include polypropylene (PP), polyvinyl alcohol (PVA), and alkali-resistant glass (ARG) macrofibers mixed at volume fractions of 0.5%, 1.0%, and 1.5%. Static and dynamic fresh properties are monitored using the vibrating Kelly ball (VKelly) test. Beam specimens are then placed under a third point bending configuration, as per ASTM C1609 Standard, to measure load versus mid-span deflection. Strength and toughness parameters are derived from the load–deflection data to assess the flexural performance of the FRC composite systems under consideration. The parameters of interest include first peak strength (pre-crack flexural strength) and post-crack residual strength and toughness provided by fiber addition. Of the mixtures tested, ARG fiber mixtures show the highest residual strength and toughness values, followed by PP and PVA fiber mixtures. ARG fibers produce the most workable mixtures at all fiber volumes, while PVA fibers show a tendency to encounter dispersion issues at higher volume doses. The outcome of this study is expected to facilitate the selection of fibers by giving insight into their relative contribution to fresh and hardened flexural properties of FRC.

Research on Fracture-CMOD Toughness of Steel Fiber Reinforced Concrete

2010 ◽  
Vol 168-170 ◽  
pp. 1784-1787
Author(s):  
Xiao Wei Wang ◽  
Wen Ling Tian ◽  
Ling Ling Fan ◽  
Ming Jie Zhou ◽  
Xiao Yan Zhao
Keyword(s):  
Fracture Toughness ◽  
Reinforced Concrete ◽  
Steel Fiber ◽  
Estimation Error ◽  
Mouth Opening ◽  
Fiber Reinforced Concrete ◽  
Crack Mouth Opening Displacement ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Toughness Index

In order to study the fracture toughness of steel fiber reinforced concrete (SFRC) and the postcracking toughness evaluation method, the fracture toughness tests were done for the four types of steel fibers and three kinds of matrix strength. According to the experiment curves of the load and the crack mouth opening displacement (Load-CMOD), the fracture toughness of SFRC was studied; the formulas of the postcracking toughness coefficient and the Fracture-CMOD toughness index were established. The experiment results show that the Fracture-CMOD toughness index can reflect sensitively to the effect on concrete toughness of the type of the steel fiber, and then it is avoid that the estimation error of the initial cracking point led to the evaluation error of the toughness.Comparison with other fibers B fiber shows the best crack resistance and the toughening ability.

scholarly journals Towards Innovative and Sustainable Construction of Architectural Structures by Employing Self-Consolidating Concrete Reinforced with Polypropylene Fibers

2020 ◽  
Author(s):  
Wael Zatar ◽  
Hai Nguyen
Keyword(s):  
Compressive Strength ◽  
Reinforced Concrete ◽  
Fiber Reinforced Concrete ◽  
Sustainable Construction ◽  
Fiber Reinforced ◽  
Compression Tests ◽  
Self Consolidating Concrete ◽  
Air Content ◽  
Slump Flow ◽  
Architectural Structures

Self-consolidating concrete (SCC) has been successfully employed to reduce construction time and enhance the quality, performance, and esthetic appearance of concrete structures. This research aimed at developing environmentally friendly fiber-reinforced concrete (FRC) consisting of SCC and recycled polypropylene (PP) fibers for sustainable construction of city buildings and transportation infrastructure. The addition of the PP fibers to SCC helps reducing shrinkage cracks and providing enhanced mechanical properties, durability, and ductility of the concrete materials. Several mix designs of self-consolidating fiber-reinforced concrete (SCFRC) were experimentally examined. Material and esthetic properties of the SCFRC mixtures that include micro silica, fly ash, and PP fibers were evaluated. Trial-and-adjustment method was employed to obtain practically optimum SCFRC mixtures, mixtures that are affordable and easy to make possessing enhanced compressive strength and esthetic properties. Slump flow and air content testing methods were used to determine the fresh properties of the SCFRC mixtures, and the esthetic properties of the mixtures were also evaluated. The hardened properties of the SCFRC mixtures were examined using three- and seven-day compression tests. The amount of fine/coarse aggregate, water, and other admixtures were varied while the Portland cement content in all mixtures was maintained unchanged. The maximum three-day compressive strength was 43.17 MPa and the largest slump flow was 736.6 mm. Test results showed enhanced material properties such as slump flow, air content and compressive strength values of the SCFRC mixtures and their excellent esthetic appearance. The favorable seven-day compressive strength of the SCFRC mixture, with 4.8 percent air content and 660.4 mm slump flow, is 39.26 MPa. The mixtures’ in this study are proven to be advantageous for potential SCFRC applications in architectural structures including building façades and esthetically-pleasing bridges.

MECHANICAL PROPERTIES OF COCONUT FIBER-REINFORCED CONCRETE

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Gino Ng ◽  
Girum Urgessa ◽  
Yared Shifferaw ◽  
Harianto Hardjasaputra
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Flexural Strength ◽  
Natural Fibers ◽  
Fiber Reinforced Concrete ◽  
Sustainable Construction ◽  
Fiber Reinforced ◽  
Coconut Fiber ◽  
Concrete Plates ◽  
Coconut Fibers

The use of natural fibers in concrete has significantly increased in recent years as a result of the push for sustainable construction. Coconut fibers, also known as coir fibers, have been used as natural fibers in concrete, particularly in some parts of Asia. This paper presents an experimental study that investigates the use of coconut fibers in concrete. Two baseline concrete mix designs were selected based on design standards with a water-cement ratio of 0.4 and 0.5 respectively. For each baseline mix design, four 20 cm x 20 cm x 1 cm concrete plates were constructed by varying the percentage of coconut fibers by weight of cement. The fiber contents studied are 0%, 0.1%, 0.175%, and 0.25%. The concrete plates were then tested to determine the mechanical properties of the coconut fiber-reinforced concrete and comparisons were made with the mix designs with 0% coconut fiber content. The results show that adding coconut fibers increases the flexural strength of concrete plates. This is particularly beneficial for low scale construction applications such as those in concrete tile production. For both mix designs, adding 0.25% of coconut fibers increased the flexural strength of the concrete plates by 90% when compared to concrete with no coconut fibers.

Properties of Polymeric Fiber-Reinforced Concrete

1996 ◽  
Vol 1532 (1) ◽  
pp. 27-35
Author(s):  
P. Balaguru ◽  
Anil Khajuria
Keyword(s):  
Compressive Strength ◽  
Reinforced Concrete ◽  
Impact Strength ◽  
Fiber Volume Fraction ◽  
Volume Fraction ◽  
Fiber Reinforced Concrete ◽  
Modulus Of Rupture ◽  
Unit Weight ◽  
Fiber Reinforced ◽  
Fiber Volume

The mechanical properties of lightweight and normal concrete containing nylon polymeric fibers are presented. Fiber reinforced concrete made with nylon fibers was evaluated. The 19-mm-long fibers were in single filament form. The control concrete was designed for a compressive strength of 20 MPa. The primary independent variable was fiber volume fraction. The response variables were air content, unit weight of fresh concrete, compressive strength, modulus of rupture (flexural strength) and toughness, splitting tensile strength, and impact strength. The addition of fibers decreased the slump values. The decrease was negligible at fiber contents of 0.45 and 0.6 kg/m3. The fibers distributed well in the matrix. Fibers could be directly added in the mixer. The effect fibers had on unit weight of concrete is negligible. Addition of fibers up to 2.4 kg/m3 did not change the compressive, flexural, and splitting tensile strengths appreciably. Impact strength and flexural toughness increased consistently with the increase of fiber volume fraction.

Experimental Study on HMPE Fiber Reinforced Concrete

2012 ◽  
Vol 598 ◽  
pp. 336-340
Author(s):  
Hisen Hua Lee ◽  
Yen Shuo Chen ◽  
Chi Wen Cheng
Keyword(s):  
Compressive Strength ◽  
Reinforced Concrete ◽  
Experimental Testing ◽  
Low Cost ◽  
Construction Material ◽  
Volume Ratio ◽  
Fiber Material ◽  
Reinforce Concrete ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced

Abstract. Concrete as a most popular construction material has many advantages such as easiness to be formed into various shapes, common availability and relative low cost. However, the low tensile strength and brittleness are disadvantages for wider application of the material. In this study, an advanced material of high strength and strong abrasion resistance HMPE fiber was used to reinforce concrete properties. A series of experimental testing were carried out to examine the properties of both fresh and hardened HMPE fiber reinforced concrete. It was found that the addition of an HMPE fiber material in concrete may enhance its compressive strength as high as 20% increment without water-reducing admixture. If a water-reducing admixture was applied, the increment of compressive strength may reach as high as 25% for 1.5% volume ratio of fiber contained in concrete.

scholarly journals Analysis of Compressive Toughness and Deformability of High Ductile Fiber Reinforced Concrete

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Mingke Deng ◽  
Jian Han ◽  
Haibo Liu ◽  
Meng Qin ◽  
Xingwen Liang
Keyword(s):  
Reinforced Concrete ◽  
Uniaxial Compression ◽  
Fiber Reinforced Concrete ◽  
Evaluation Index ◽  
Peak Strain ◽  
Fiber Reinforced ◽  
Toughness Index ◽  
Fiber Bridging ◽  
Toughness Evaluation ◽  
Mortar Matrix

The compressive toughness evaluation index of HDC (high ductile fiber reinforced concrete) is studied through three groups of uniaxial compressive tests of HDC specimens with different fiber mixing amounts, and an equivalent analysis of their deformability is carried out, coming to the following conclusion:(1)the peak strain of HDC under uniaxial compression can be up to 3.41~3.67 times as large as that of the mortar matrix;(2)the equivalent compressive toughness index reflects the unit volume deformation energy of specimens under uniaxial compression and it can be used as the compressive toughness evaluation index of HDC;(3)the fiber bridging effect of HDC increases the equivalent compressive toughness index and the compressive deformability up to 3 times of the mortar matrix;(4)the relationship between the equivalent compressive toughness indexWcu0.85and the fiber mixing amountφis established according to the test results; and(5)the fiber bridging effect of the matrix in HDC can be equaling as a large number of constraint stirrups installed in the specimens, which significantly enhances the compressive toughness and the compressive deformability of specimens.

scholarly journals Sustainability Comparison for Steel and Basalt Fiber Reinforcement, Landfills, Leachate Reservoirs and Multi-Functional Structure

2019 ◽  
Vol 5 (1) ◽  
pp. 172 ◽  
Author(s):  
IfeOluwa B. Adejuyigbe ◽  
Paschal C. Chiadighikaobi ◽  
Donatus A. Okpara
Keyword(s):  
Reinforced Concrete ◽  
Building Materials ◽  
Construction Materials ◽  
Basalt Fiber ◽  
Steel Structures ◽  
Fiber Reinforced Concrete ◽  
Sustainable Construction ◽  
Tropical Region ◽  
Fiber Reinforced ◽  
Waste Products

To a large extend sustainable construction of any structure greatly depends on the materials used in its formation. Traditionally, materials such as bricks, mortar, steels are still important components of most buildings. But modern technology is equally changing how materials are created and used.Based on the above explanation, the objective of this paper was to compare the steel structures with basalt fiber reinforced concrete. As basalt fiber is still not wide spread, this paper focus on the advantages, usages and applications of basalt fiber reinforced concrete to solve construction and structural challenges. The method and analysis used in this paper was derived from research and works done by previous authors on similar topics. Previous research information show that producers and users of these materials make choice of building materials to depend on the area the structure is proposed to be built and on the taste and ideas given by the client. Their consideration is often devoid of environmental, psychological, social and economy factors. The research methods lead to the understanding on the use and importance of basalt fiber concrete for landfills, leachate reservoirs and multifunctional structure.This paper helps structural users and engineers to know that green materials with good environmental characteristics that support nature are being considered as best construction materials due to what they are composed of. Waste and cost are also crucial as far as construction materials are concern. Even now, management of waste products from landfills specially leachates requires better construction designs in tropical region like Nigeria. More so, in line with the recent safe the climate calls, efforts to select the kind of material used in raising structures are becoming unavoidable.

scholarly journals Compressive Strength Assessment using GGBS and Randomly Distributed Fibers in Concrete

2019 ◽  
Vol 9 (2) ◽  
pp. 1078-1086
Keyword(s):  
Compressive Strength ◽  
Reinforced Concrete ◽  
Cement Content ◽  
Construction Material ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Strength Assessment ◽  
Compressive Strength Of Concrete ◽  
By Products

India is producing enormous amounts of industrial by-products out of which 150 million tonnes of GGBS itself. Apart from disposal of this solid waste, engineers strive for its value addition through its use as a construction material for achieving better economy, eco-friendliness without compromising on technical aspects. In this study, varieties of concrete are mixed with GGBS as a replacement material for cement to understand its compressive strength and long term behaviour. It is seen from literature that the fibers enhance the performance of concrete. Accordingly, six trials were made with GGBS replacement along with variation of cement content, water cement ratio and steel fibers with aspect ratio 60 and variation in reinforcing indices. The workability of concrete increased with increasing the GGBS content and also observed there is a reduction in workability in fiber reinforced concrete. The results indicated that the concrete made with GGBS indicates the strength comparable to the concrete made with OPC for all replacement levels. There is a substantial decrease in strength at 80% replacement. While there is a substantial increase in long-term strength. The compressive strength of GGBS concrete was increased up to 19% than that of OPC concrete and also observed 5 to 12% strength increased in fiber reinforced concrete than GGBS concrete. For this purpose studied the compressive strength of concrete at the ages of 3, 7,28,56,90 and 180 days.

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